Because the Secret Service aren’t allowed into the Oval Office, they turned the floor into a giant, digital scale so that they can monitor where the President is at all times.
Abraham Lincoln created the secret service just hours before he was assassinated.
After JFK was assassinated, there was a brief scuffle between local and federal authorities when the President’s security detail wasn’t allowed to remove his body from the hospital. It ended when the Secret Service agents put the local officials against the wall at gunpoint.
In 2011, a man shot a high powered rifle at the White House, hitting it at least 7 times. It took Secret Service 4 days to realize this, and they did so only after a housekeeper noticed broken glass and cement on the floor.
Ronald Reagan, suffering from Alzheimers, would rake leaves for hours, not realizing that they were being constantly replenished by his Secret Service men.
A Secret Service agent that saved Pres. Reagan’s life after an assassination attempt had become a Secret Service agent after seeing movies as a child about the Secret Service. Those movies starred Ronald Reagan.